Lid with button

ABSTRACT

A lid for use with a plastic container is described. The lid includes a button that assists in securing the lid to the plastic container. The button is raised from the surface of the lid. The button includes one or more concentric circles raised from the button. The raised design of the button assists in transferring the pressing force supplied by the user concentrically throughout the lid and to the rim of the lid. The button and the concentric circles provide a target for the user to press with their finger to actuate the sealing of the lid to the container.

FIELD OF THE INVENTION

The present invention relates to a lid for use with a container. The lidincludes a button that assists in securing the lid to the container.

BACKGROUND OF THE INVENTION

Plastic food containers have been used for years to store food products.Specialized plastic containers have been developed to improve thepackaging of food products through lids with specialized rim structuresthat provide a better seal for storage of the food product. These rimstructures require a pressing force to properly seal the lid to thecontainer to avoid food spoilage.

Many plastic food containers include lids that must be sealed to thecontainer. If such a lid is not fully and completely sealed to thecontainer, then food spoilage may occur. The top surface of the lid maybe slippery from condensation resulting from the refrigeration of thecontainer. This may hinder the user when the user is sealing thecontainer.

SUMMARY OF THE INVENTION

A lid for use with a plastic container is described herein. The lidcomprises a printable surface and a button protruding from the printablesurface, the button comprising a plurality of concentric circles,whereby pressing the button seals the lid to the plastic container. Thebutton and the concentric circles improve the sealing of the lid to theplastic container. The printable surface is a planar region surroundingthe button that may be printed with design, text, or other indicia.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 shows a view of the lid.

FIG. 2 shows a close-up view of the button of the lid.

FIG. 3 shows a side sectional view of the button of the lid.

FIG. 4 shows a close-up, side sectional view of the button of the lid.

FIG. 5 shows a side sectional view of the lid connecting to thecontainer.

FIG. 6 shows a close-up, side sectional view of the lid connecting tothe container.

FIG. 7 shows a close-up view of the rim of the lid connecting to thecontainer.

DETAILED DESCRIPTION

A lid for use with a plastic container is described herein. The lidcomprises a button that assists in securing the lid to the plasticcontainer. The button is raised from the surface of the lid. The buttonincludes a plurality of concentric circles raised from the button.

The button and the plurality of concentric circles provide manyimportant advantages:

The button and the plurality of concentric circles assist the user insecuring the lid to the container, namely, the button and the concentriccircles provide a target for the user to press with their finger toactuate the sealing of the lid to the container. The user will visuallynote the button and will aim their hand and finger movement toward thebutton.

The concentric circles also provide a frictional gripping surface forthe finger of the user. A pad of the finger of the user willfrictionally hold against the concentric circles. This reduces thetendency for the finger to slip on the surface of the lid.

The raised design of the button also assists in transferring thepressing force supplied by the user concentrically throughout the lidand to the rim of the lid. This promotes a complete closure of the lidon the container, instead of leaving a portion of the rim of the lidunclosed and subjecting the food product in the container to spoilage.

In addition to helping to transfer the pressing force of the user, thebutton design also reduces the likelihood that the lid, when pressed,will contact the food product contained within the container. Theappearance of the food product is important to consumers, and it isdesired to not disturb the appearance of the food product by pressing onthe lid and forcing the lid into the food. The button is raised from theremainder of the lid. This difference in height permits the user topress the button causing the lid to attach to the container without thelid contacting the food product within the container.

As discussed above, the concentric circles provide many advantages. In apreferred embodiment, the inclusion of four concentric circles providesaid advantages and is still commercially feasible to manufacture. Inother embodiments, fewer or additional concentric circles may be used.

The lid finds utility in food packaging containers, especially dairypackaging containers for butter, margarine, cottage cheese, sour cream,etc. The container and lid of the present disclosure may be used with avariety of different sized containers. Preferred embodiments includeone-pound tubs and three-pound plastic tubs. However, the presentinvention is not limited by the particular contents of the container.

The lid and container may be constructed from a variety of plasticmaterials, such as polypropylene, low-density polyethylene, andhigh-density polyethylene. A particularly preferred material ispolypropylene, since polypropylene provides a “popping” sound when thelid securely attaches to the container. The audible signal reassures theuser that they have successfully attached the lid to the container.

The lid may be manufactured through conventional plastic formingtechniques. Injection molding is one suitable technique. The injectionmolding process generally includes assembling a mold from one or moremold pieces that will ultimately form the plastic container or lid.Plastic resin is melted, and the melted plastic resin is then injectedinto the mold. After cooling, the mold is separated and the lid orcontainer is ejected out of the mold.

The lid with the button design and the container may also bemanufactured via thermal forming processes. Typically, a sheet ofplastic material is heated and placed onto a vacuum mold. Vacuum suctiondraws the heated sheet into the mold. After cooling, the container isreleased from the mold.

In operation of the button, the user pushes the button, typically withtheir finger. The button transmits this pushing force concentrically toengage the rim of the lid onto the container. The button assists intransferring the pushing force.

As used herein, the term “button” refers to a raised portion of the lidthat extends or protrudes from the remainder of the lid. Generally, thebutton will rise from the flat or planar surface of the remainder of thelid. The button is approximately circular in shape. The circular shapeof the button concentrically transfers the pressing force of the user tothe rim.

As used herein, the term “printable surface” refers to the generallyflat or the generally planar region of the lid surrounding the button.The printable surface may include text, such as trademarks, productingredients, nutritional data, designs, ornamentation, etc. The text maybe applied to the printable surface by stamping, printing, inkapplication, etc.

An embodiment of the present invention will now be described withreference to the Figures. As shown in FIG. 1, a lid 10 is embodied. Thelid 10 includes a button 50 in a center of the lid 10. A close up viewof the button 50 is shown in FIG. 2. The button 50 further includesconcentric circles 100. The button 50 rises from the lid 10. In thecenter of the concentric circles 100, a flat surface 110 of the button50 is located. As shown in FIG. 3, the concentric circles 100 aregenerally evenly spaced apart from each other.

As shown in FIG. 4, the concentric circles 100 rise from the flatsurface 110. In this embodiment, four concentric circles 100 areincluded on the button 50. Each concentric circle 100 includes an innersurface 105, an outer surface 106, and a top surface 107. The concentriccircles 100 are wider at their base, i.e., the region connecting to theflat surface 110. The concentric circles 100 are also narrower at theirapex, i.e., at their top 107. The inner surface 105 and the outersurface 106 form sloped edges to the concentric circles 100. Since theinner surface 105 and the outer surface 106 are sloped, the likelihoodthat the button 50 will stick to its mold during the manufacturingprocess is reduced. The sloped nature of the inner surface 105 and theouter surface 106 also assists the finger of the user in frictionallygripping to the button 50.

The perimeter of the button 50 is formed by a draft angle 200. The draftangle 200 is approximately 95 degrees to approximately 115 degrees froma printable surface 300 of the lid 10. The draft angle 200 allows thelid 10 to easily slip from a mold used in the manufacturing of the lid10. The flat surface 110 is raised from the printable surface 300 by afirst distance 225, which reduces the likelihood that pressing on thebutton 50 will cause the lid 10 to contact a food product in a container500.

The printable surface 300 surrounds the button 50. The printable surface300 provides a generally flat or planar region for text or other designsto be stamped, printed, or included in or on the printable surface 300.The printing of the printable surface 300 may be accomplished by cuttinga hole in a pad of a printing plate. The hole in the printing plateallows the button 50 to protrude into the hole of the pad, and thus thebutton 50 does not interfere with the printing on the printable surface300.

As shown in FIG. 5-7, the printable surface 300 connects to a rim 400.The rim 400 includes a vertical member 330, a top surface 425, and aperimeter 430. The top surface 425 is the highest point of the rim 400.The vertical member 330 rises from the printable surface 300 by a seconddistance 350. The second distance 350 is approximately the same lengthas the first distance 225. The vertical member 330 is integral with thetop surface 425, which is further integral with the perimeter 430. Acombination of the vertical member 330, the top surface 425, and theperimeter 430 forms an annular cavity that receives a container rim 510of the container 500.

The closure of the lid 10 will now be described. As the lid 10 ispressed onto the container rim 510, a lip 511 of the container rim 510may temporarily deform toward the container 500 as an annular bump 431of the perimeter 430 is pressed over the lip 511. At the same time, theperimeter 430 may also temporarily deform away from the container 500 asthe annular bump 431 presses against the lip 511. The perimeter 430 ofthe rim 400 covers the container rim 510 of the container 500. Thisinteraction of the components of the rim 400 and the container rim 510seals the lid 10 to the container 500 to preserve the food productwithin the container 500. As described, a pressing force is needed tocause the lip 511 of the container rim 510 to temporarily deform and/orto cause the perimeter 430 to temporarily deform.

The top surface 425 of the rim 400 is in approximately the same place asthe top surface 107 of the concentric circles 100. The second distance350 is approximately the same as the first distance 225. The printablesurface 300 is in a lower plane than both the top surface 107 and thetop surface 425 of the rim 400.

This spatial relationship between the top surface 425 of the rim 400,the printable surface 300, and the top surface 107 of the concentriccircles 100 assists in transferring the pressing force received by thebutton 50 through the printable surface 300 and to the rim 400. Thetransfer of the pressing force is needed to fully seal the rim 400 tothe container 500. If the transfer of the pressing force is notaccomplished, the user may have to close the container 500 by pressingon the rim 400 multiple times and in multiple places. The design of thepresent invention overcomes this disadvantage.

The button 50 provides many advantages. It provides a visual target or“bulls eye” for the user to press when sealing the lid 10. The button50, with its concentric circles, provides a non-stick and non-slipsurface for the user to press on the lid 10. The button 50 provides atarget in the center of the container to help fully seal the lid 10 tothe container. Further, the button 50 assists in concentricallytransferring the pressing force to the lid 10 to cause the lid 10 toseal to the container 500.

As is evident from the foregoing description, certain aspects of thepresent invention are not limited by the particular details of theexamples illustrated herein, and it is therefore contemplated that othermodifications and applications, or equivalents thereof, will occur tothose skilled in the art. It is accordingly intended that the claimsshall cover all such modifications and applications that do not departfrom the spirit and scope of the present invention.

1. A lid for use with a plastic container, comprising: a printable surface; a rim surrounding the printable surface, the rim comprising a top surface raised from the printable surface; a button protruding from the printable surface; the button comprising a plurality of concentric circles; the plurality of concentric circles are in approximately a same plane as the top surface of the rim, and whereby pressing the button seals the lid to the plastic container.
 2. The lid according to claim 1, wherein the button comprises four concentric circles.
 3. The lid according to claim 1, wherein the lid and the plastic container are made from a polypropylene.
 4. The lid according to claim 1, wherein the button transfers a pushing force.
 5. The lid according to claim 1, wherein the button transfers a pushing force concentrically to a rim of the lid.
 6. The lid according to claim 1, wherein the button provides a target for a user to press or push.
 7. The lid according to claim 1, wherein the button provides a gripping surface or a frictional surface for a finger of a user.
 8. The lid according to claim 1, wherein the button reduces contact of the lid to a food product in the container when the lid is sealed to the container.
 9. The lid according to claim 1, wherein a perimeter of the button forms an angle of approximately 95 degrees to approximately 115 degrees to the printable surface.
 10. The lid according to claim 1, wherein the button extends or rises from the printable surface.
 11. The lid according to claim 1, wherein the concentric circles are wider at a base of the concentric circles, and the concentric circles are narrower at an apex of the concentric circles.
 12. The lid according to claim 1, wherein pressing the button causes a lip of the container rim to temporarily deform or causes a perimeter of the lid rim to temporarily deform.
 13. The lid according to claim 1, wherein a perimeter of the rim covers a container rim.
 14. The lid according to claim 1, wherein the rim comprises a vertical member, a top surface, and a perimeter.
 15. The lid according to claim 14, wherein a combination of the vertical member, the top surface, and the perimeter forms an annular cavity that receives a container rim of the container.
 16. The lid according to claim 1, the lid according to claim 1, wherein the concentric circles have an inner surface and an outer surface forming sloped edges to the concentric circles.
 17. The lid according to claim 1, wherein the printable surface provides a planar region for text or other designs to be stamped, printed, or included in or on the printable surface.
 18. A three-pound or a one-pound plastic dairy tub comprising the lid according to claim
 1. 19. A lid for use with a plastic container, comprising: a generally flat surface; a rim surrounding the generally flat surface, the rim comprising a top surface raised from the generally flat surface; a button protruding from the generally flat surface; the button comprising a plurality of concentric circles; and the plurality of concentric circles are approximately the same distance above the generally flat surface as the top surface of the rim, and whereby pressing the button seals the lid to the plastic container.
 20. A method of securing a lid to a plastic container, comprising: pressing a button protruding from a printable surface of a lid, wherein the button comprises a plurality of concentric circles; and transferring the pressing force to a rim surrounding the printable surface, the rim comprising a top surface raised from the printable surface, wherein the plurality of concentric circles are in approximately a same plane as a top surface of the rim, and; sealing the lid to the plastic container. 